Go to (gear icon) and click Pause syncing . Select a timeframe like "2 hours."
Here is the definitive, exclusive guide to fixing the Prototype 2 save failure once and for all. Method 1: Grant Administrative Privileges
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Open (Ctrl+Shift+Esc), go to the Details tab, and right-click prototype2.exe . Select Set affinity and uncheck all but CPU 0, 1, 2, and 3 .
Don't touch slot-A.bin or slot-B.bin —those are your actual story progress saves. Deleting the profile file forces the game to generate a fresh, clean configuration. 4. Create a Local Administrator Account Go to (gear icon) and click Pause syncing
Right-click the Prototype 2 folder (or the Activision folder if it exists). Select > Security . Click Edit > Add > Type Everyone > Click OK . Check Allow for Full Control . Click Apply and OK . Exclusive Fix 4: Disable OneDrive/Controlled Folder Access
Once your saving problems are fixed, you might encounter stability issues stemming from high-core CPUs and modern hardware polling. Use these exclusive tweaks to ensure optimal performance. The High-Core CPU Crash Fix (Processor Affinity) This link or copies made by others cannot be deleted
Running the game as administrator ensures that it has the necessary permissions to save data.
Sometimes Steam Cloud creates conflicts with local saves. Disable it, create a new save, and then turn it back on.
Many generic solutions fail. If you are tired of losing your progress, this guide offers to permanently solve the "Failed to save data" issue in Prototype 2 in 2026. Why Does Prototype 2 Fail to Save?